How to select sigma size for Gaussian Filter ??
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We have Gaussian filter defined as G(x,y)=e^(-(x^2+y^2)/(2*sigma^2)) according to Gonzalez.
Can somebody please tell me how to choose the value of sigma???
Also please tell me how to choose the value of n, if n*n is filter size?
Acc. to Gonzalez n>=6*sigma and n is odd. So if sigma=4. n=25. But using these values gives a White image (Blank Image)
For me sigma=.2 and n=25 is working. Any comments???
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